Demonstrating device.



HIP. PRIEST.

' DEMONSTRATING DEVICE.

APPLICATION FILED 0013.3, 1911.

/ 1,034,297. Patented July so, 1912.

amuewloz l/Witnesses HARRY R. PRIEST, OF LOUDONVILLE, OHIO.

DEMONSTRATING DEVICE.

Specification of Letters Patent.

Application filed October 3, 1911.

Patented July 30, 1912.

Serial No. 652,587.

To all whom it may concern:

Be it known that I, HARRY R. PRIEsT, citizen of the United States,residing at Loudonville, in the county of Ashland and State of Ohio,have invented certain new and useful Improvements in DemonstratingDevices, of which the following is a specification.

This invention relates to a demonstrating device for use indemonstrating the suction action of the plates of false dentures, and ismore particularly designed for use in demonstrating denture platesofthat type provided with suction cups of rubber, or similar material.It is a wellknown fact that such denture plates embody advantages overthe ordinary or old style of plate in which the adherence of the plateto the roof of the mouth and gums was dependent solely upon the concavesurface portions of the plate, but it has been found diflicult toexplain to the laymen just why a denture plate provided with a suctioncup, such as above mentioned, will adhere more firmly to the roof of themouth and to the gums.

The invention, therefore, contemplates the provision of a demonstratingmodel of transparent material, which model has a surface conforming incontour substantially to the contour of the roof of the mouth or to thecontour of the gums,-as the case may be, the artificial denture plate tobe demonstrated being adapted to be disposed against this surface of themodel and the action of the suction cup noted by looking through themodel from the opposite side thereof.

For a full understanding of the invention reference is to be had to thefollowing description and accompanying drawing, in which Figure 1 isagroup perspective view illustrating a demonstrating model embodying thepresent invention and designed foruse in demonstrating an upper dentureplate, and also illustrating the said denture plate. Fig. 2 is atransverse sectional view through the model and denture plate. Fig. 3 isa group perspective view similar to Fig. 1 illustrating the form ofmodel used in demonstrating a lower denture plate, the said lowerdenture plate being also shown in thls figure. I

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the accompanying drawingby the same reference characters.

The demonstrating model for use in demonstratlng an upper denture plateis clearly shown in,Figs. 1 and 2 of the drawing, and

is indicated in general by the reference numeral 1. This model ispreferably molded of glass although other vitreous transparent materialmay be employed and the model has an under face 2 which conforms incontour to the roof of the mouth. The upper surface of the model isindicated by the numeral 3 and may be flat or may correspond to thecontour of the side 2 of the model if desired. In any event, the surface2 is smooth and non-porous.

The upper denture plate to be demonstrated by the use of the model 1, isillustrated in Figs. 1 and 2 of the drawings, and indicated by thenumeral 1, and being provided with an upper surface 5 of a contour tofit against and to conform to the contour of the surface 2 of thedemonstrating model 1 and being provided on its said upper surface witha suction cup 6 of soft rubber or other material suitable for use inthis connection. The under surface 2 of the demonstrating model 1 beingsmooth and non-porous when the denture .plate 4 is disposed thereagainstin the same manner as it would be against the roof of the mouth, the.cup 6 will be flattened out and the air will be expelled from betweenthe same and the said surface of the model 1, the denture plate and cupthen resting against the under surface of the model in the manner shownin Fig. 2 of the drawings. The person to whom the action of the suctioncup 6 is being explained, may then view the said cup through the modelby looking at the side 3 of the model, and the one demonstrating thedenture plate may slightly pull the plate away from the surface 2 of themodel to about the dotted line position shown in Fig. 2 of the drawing,so as to demonstrate the fact that the cup will hold firmly to the model(which takes the place of the roof of the mouth) even though some littleeffort is made to remove it from the model.

The demonstrating model used in demonstrating the lower denture plate isindicated in Fig. 3 of the drawing by the numeral 7 and is ofsubstantially the same contour as the lower gums and, like the model 1is formed of glass or other suitable material. The ends of this modelare preferably connected and braced by a cross-bar 8 also of glass. Thedenture plate to be demonstrated upon this model 7 is indicated in Fig.3 by the reference numeral 9 and is provided at each end with a suctioncup 10, these cups being located upon the under surface of the saidplate 9 in the manner illustrated in the said Fig. 3 and this said undersurface being concave as at 11 to fit over the upper surface 12 of themodel 7 and conform to the contour thereof. It will be readilyunderstood that the suction cups 10 will adhere to the surface 12 of themodel 7 at the ends of the model in the same manner as does the cup 6 tothe under surface 2 in the model 1 in the previously described form ofthe invention and that the action of the cups 10 in holding the lowerdenture plate in place may be viewed through the ends of the model 7From the foregoing description of the invention it will be readilyunderstood that there is provided an extremely simple demonstratingdevice for the purpose specified, which device may be readily employedto clearly demonstrate to a patient the exact manner in which thesuction cups and denture plates act in holding these plates to the roofand gums of the mouth. It will also be understood from the foregoingthat While there is a decided advantage in forming the demonstratingmodels from transparent material, these models may be formed ofporcelain or other material which is not transparent, but which isvitreous or nonporous where it is not considered essential that theaction of the suction cups of the denture plates may be actually viewed.However, as stated, the use of a transparent material is one of theessential features of the preferred form of the invention.

Having thus described the invention what is claimed as new is 1. Adevice for demonstrating the suction action of artificial denturesconsisting of a transparent model having a surface conforming to thesuction surface of such a denture.

2. A demonstrating device for use in demonstrating the suction action ofartificial denture plates comprising a model of transparent non-porousmaterial having a surface conforming to the contour of the suction sideof the said denture plate to be demonstrated.

In testimony whereof I affix my signature in presence of two witnesses.

HARRY R. PRIEST. [1,. s]

Witnesses MARTIN J. HOFFMAN,

W. S. HIssUN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Yatents,

' Washington, .D. C.

